Centrifugal blower fan



FIG. 1 is a front perspective view of a centrifugal blower fan of thepresent invention;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a cross-section view taken along the line 8—8 of FIG. 2.

I claim the ornamental design for a centrifugal blower fan, as shown anddescribed.